Electric cable clamp



FIG. 1 shows a bottom perspective view of my design for an electric cable clamp;

FIG. 2 shows a right-side view thereof;

FIG. 3 shows a left-side view thereof;

FIG. 4 shows a bottom view thereof; and,

FIG. 5 shows a top view thereof.

The portions of the electric cable clamp shown in broken line form no part of the claimed design. 

The ornamental design for an electric cable clamp, as shown and described. 